Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Allegan experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 23°F in January while summers reach 70°F in July. The area gets 261 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 46. 63% of days have good air quality. The city sits at an elevation of 617 feet.
Temperature
23°F Jan (-5°C)70°F Jul (21°C)
Annual Average
47.4°F
12% below US avg
January Average
23°F (-5°C)
July Average
70°F (21°C)
Sunny Days
261 days/yr
Geography
Elevation
617 ft (188 m)
Area
4.3 sq mi (11.0 km²)
Population Density
1,346/sq mi
Coordinates
42.5311°N, 85.8392°W
Timezone
America/Detroit
County
Kalamazoo County County
Nearest Airport
Kalamazoo/Battle Creek International (AZO) 25 miles away
Precipitation & Snow
Wettest Month (Sep)4.25"
Driest Month (Feb)1.61"
Air Quality
AQI Median
46.0
Rating
Good
Good Days %
63.3%
Unhealthy Days
4
Natural Hazard Risk
Overall Risk
Relatively Moderate
Risk Score
81.7 / 100
Social Vulnerability
18.5 / 100
Community Resilience
91.5 / 100
Hazard Breakdown
Tornado
Relatively High
Hurricane
Very Low
Earthquake
Relatively Low
Wildfire
Very Low
Flood
Relatively Moderate
Hail
Relatively High
Strong Wind
Relatively High
Heat Wave
Relatively Low
Winter Weather
Relatively Moderate
Lightning
Relatively Moderate
Ice Storm
Relatively Moderate
Drought
No Rating
Cold Wave
Relatively Moderate
Landslide
Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M4.2.
May 2, 2015
5 km S of Galesburg, Michigan
M4.2
47 km
4 km
Sep 2, 1994
5 km SSW of DeWitt, Michigan
M3.5
105 km
5 km
Jun 30, 2015
5 km NNE of Burlington, Michigan
M3.3
78 km
5 km
Jan 26, 2012
5 km NE of Topeka, Indiana
M3.0
110 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
295 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF5. Total: 31 fatalities, 801 injuries.
Date
Rating
Distance
Path
Fatalities
Apr 3, 1956
EF5
34 km
58.8 mi
17
Apr 2, 1977
EF4
68 km
16.6 mi
1
Apr 2, 1977
EF4
37 km
12.4 mi
0
Apr 21, 1967
EF4
96 km
12.0 mi
0
Apr 11, 1965
EF4
55 km
20.6 mi
5
Aug 24, 2007
EF3
83 km
6.5 mi
0
Mar 27, 1991
EF3
79 km
2.0 mi
0
May 15, 1986
EF3
98 km
1.2 mi
0
May 13, 1980
EF3
28 km
10.6 mi
5
May 13, 1980
EF3
47 km
21.0 mi
0
Apr 21, 1967
EF3
41 km
13.6 mi
0
Apr 11, 1965
EF3
27 km
14.2 mi
0
Apr 11, 1965
EF3
46 km
14.1 mi
0
Apr 3, 1956
EF3
38 km
60.6 mi
0
Aug 6, 2024
EF2
56 km
8.5 mi
0
May 7, 2024
EF2
73 km
19.5 mi
0
May 7, 2024
EF2
40 km
10.9 mi
0
Jun 5, 2010
EF2
67 km
2.7 mi
0
Jun 5, 2010
EF2
80 km
10.7 mi
0
Jun 5, 2010
EF2
82 km
3.4 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
Highest wave on record: 3.0 m (10 ft).
Year
Location
Cause
Max Wave
Deaths
Distance
1954
MICHIGAN CITY, IN (LAKE MICHIGAN)
Avalanche
3.0 m
7
126 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
1 wildfire (100+ acres) recorded within 100 km.
Largest: ALLEGAN6 (1,077 acres, 1988).
Year
Name
Acres Burned
Distance
1988
ALLEGAN6
1,077
17 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
23°F (-5°C)
2.4 in
Coldest
February
26°F (-4°C)
1.6 in
Driest
March
35°F (2°C)
2.6 in
April
47°F (8°C)
3.5 in
May
58°F (14°C)
3.4 in
June
66°F (19°C)
3.7 in
July
70°F (21°C)
3.5 in
Warmest
August
69°F (21°C)
3.7 in
September
62°F (17°C)
4.3 in
Wettest
October
51°F (10°C)
3.0 in
November
39°F (4°C)
3.5 in
December
28°F (-2°C)
3.3 in
Allegan has a seasonal temperature swing of 47°F / from 23°F in January to 70°F in July. Total annual precipitation is 38.3 inches, with September being the wettest month (4.3") and February the driest (1.6").
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